In February 1780, and at the general elections of 1780 and 1784, Stanley was returned unopposed for Lancashire. He consistently opposed North’s Administration till the end; voted against Shelburne’s peace preliminaries, 18 Feb. 1783, and for Fox’s East India bill, 27 Nov. 1783. He was a member of the St. Alban’s Tavern group (January 1784), which tried to unite Pitt and Fox, and on its failure voted against Pitt’s Administration.
On 14 May 1781, Stanley, in his first reported speech, seconded Burke’s motion condemning the confiscation of private property in St. Eustatius; on 21 May he supported the proposition of his fellow Member, Sir Thomas Egerton, to give the same bounties to cotton as to linen; on 24 June 1783 he spoke at length on the cotton and linen industries and their growing importance to the country, which he claimed was being undermined by ‘foreign competition, heavy taxes, and high wages’.
He died 25 Dec. 1816.
